Application and machining of Zerodur for optical purposes

Norbert Reisert

doi:10.1117/12.47835

1 March 1991 Application and machining of Zerodur for optical purposes

Norbert Reisert

Proceedings Volume 1400, Optical Fabrication and Testing; (1991) https://doi.org/10.1117/12.47835
Event: Singapore, 1990, -, Singapore

Abstract

''Zerodur'' is a glass ceramic made by SCHOTT GLASWERKE, exhibiting special physical properties, while also being optimally suited for a variety of applications. Thermal expansion of ''Zerodur'' is zero over a large temperature range and temperature variations, thus, have no bearing on the geometry of workpieces, which makes ''Zerodur'' ideally suited for the use as mirror substrate blanks for astronomical telescopes, x-ray telescopes, or even for chips production, where maximum precision is a prime requirement. The temperature-independent base blocks of ring laser gyroscopes, as well as range spacers in laser resonators are likewise made of ''Zerodur''. ''Zerodur'' can be machined like glass, but unlike with many optical glasses the warming generated upon cementing and polishing does not cause any deformations of tension at the surface. The paper aims to provide a general view of the most essential properties of ''Zerodur'', its major fields of application, the manufacture and the machining in the forma of grinding and polishing.

Citation Download Citation

Norbert Reisert "Application and machining of Zerodur for optical purposes", Proc. SPIE 1400, Optical Fabrication and Testing, (1 March 1991); https://doi.org/10.1117/12.47835

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